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AssigneeAkzo Nobel N.V.
InventorsDennis N. Stamires, Michael F. Brady, William Jones, Fathi Kooli
Estimating the term…
Economical and environment-friendly processes for the synthesis of anionic clays and anionic clay-like materials with acetate anions as the charge-balancing interlayer species are disclosed. The processes involve combining a slurry of a gibbsite or its thermally treated form with a slurry or solution of a magnesium source and magnesium acetate. The product is not washed, needs no filtration and exists in a close-to-neutral pH condition. The product can be spray dried directly to form microspheres, or it can be extruded to form shaped bodies. Because of the absence of foreign salts, the product can be combined with other ingredients in the manufacture of catalysts, absorbents, pharmaceuticals, cosmetics, detergents and other commodity products that contain anionic clays.
A process for the preparation of anionic clays, comprising reacting a slurry comprising aluminum trihydrate or its thermally treated form with a magnesium source and magnesium acetate to obtain an anionic clay.
A process for the preparation of a Al—Mg solid solution, comprising:
A process for the preparation of anionic clays, which comprises reacting a slurry comprising (i) a first slurry comprising thermally treated aluminum hydrate that has been combined with (ii) a second slurry comprising a magnesium source and magnesium acetate, to obtain an anionic clay.
Dependencies are inferred from the claim text.